The evaluation of anorectal fistula begins with a history and physical exam.

Physical findings in those with anorectal fistula include:

• Tender, firm lump near the anus
• Tiny passageway in the skin
• Anal skin redness

The diagnosis of anorectal fistula requires testing.

Tests for anorectal fistula may include:

• Anoscopy
• Sigmoidoscopy
• Colonoscopy